ucaaxxx@live.ucl.ac.uk is called your Windows Live ID and should be used to log in to your live@UCL account via Outlook Web App. It is just an ID.

f.bloggs.14@ucl.ac.uk on the other hand is your actual email address and this is the address that you should distribute to people you know.

Although the Windows Live ID (ucaaxxx@live.ucl.ac.uk) works, and you will not have lost email if people have sent messages to you via your ID, you should now get in the habit of distributing your actual email address instead.

If you were to experience any issues with your account, it would be easier for UCL support staff to investigate and provide assistance if the messages were coming via your actual email address: f.bloggs.14@ucl.ac.uk.

If you wish to have an email address with a different name you will need to email Postmaster to request this who will be able to set this up for you (provided there are no clashes with existing email addresses).

If you are a student, the ".14" (or ".13" or".12" depending on when you started) will remain in your email address.

UCL is currently the target of a malware email
attack. Several compromised accounts inside UCL are being used to send
attachments with malware/viruses. The source looks trustworthy because the
sender is a member of UCL staff; if you are not expecting an attachment from
another staff member, please do not open it immediately. Contact the sender and
ask if they sent you an attachment.